JPH0713311B2 - Zinc electrolysis method and apparatus - Google Patents
Zinc electrolysis method and apparatusInfo
- Publication number
- JPH0713311B2 JPH0713311B2 JP62049802A JP4980287A JPH0713311B2 JP H0713311 B2 JPH0713311 B2 JP H0713311B2 JP 62049802 A JP62049802 A JP 62049802A JP 4980287 A JP4980287 A JP 4980287A JP H0713311 B2 JPH0713311 B2 JP H0713311B2
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- Prior art keywords
- zinc
- electrolytic solution
- cathode
- sides
- anode
- Prior art date
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、亜鉛の電解方法及び装置に関する。TECHNICAL FIELD The present invention relates to a zinc electrolysis method and apparatus.
（従来の技術） 従来の亜鉛の電解方法は、第３図に示す如く陰極として
Al板１を電解槽２内の電解液３中に垂直にして浸漬して
配し、このAl板１に対向して陽極として浸漬してPb−Ag
1wt％板４を電解液３中に垂直にして浸漬して配して電
解を行い、Al板１にZn5を電着するものである。(Prior Art) A conventional zinc electrolysis method is as a cathode as shown in FIG.
The Al plate 1 is vertically dipped in the electrolytic solution 3 in the electrolytic cell 2 to be placed, and the Al plate 1 is opposed to the Al plate 1 to be dipped as an anode to form Pb-Ag.
The 1 wt% plate 4 is vertically dipped in the electrolytic solution 3 and disposed to perform electrolysis, and Zn5 is electrodeposited on the Al plate 1.
（発明が解決しようとする問題点） ところで、上記の亜鉛の電解方法では陽極であるPb−Ag
1wt％板４から発生する酸素の酸素過電圧が高くまた酸
素気泡により電流が通りにくい為、電解速度が遅くてAl
板１へのZn5の電着に長時間要し、40数時間に１回の割
合でAl板１からZn5を剥離するので、甚だ能率が悪く、
しかもその都度電解液３中よりAl板１を引き上げねばな
らないので、甚だ作業性が悪いものである。(Problems to be Solved by the Invention) By the way, in the above zinc electrolysis method, Pb-Ag which is an anode is used.
Since the oxygen overvoltage of oxygen generated from the 1 wt% plate 4 is high and the current is difficult to pass due to oxygen bubbles, the electrolysis rate is slow and Al
It takes a long time to electrodeposit Zn5 on the plate 1, and Zn5 is peeled from the Al plate 1 once every 40 hours, so the efficiency is very low,
Moreover, since the Al plate 1 has to be lifted up from the electrolytic solution 3 each time, the workability is extremely poor.
この為、電解速度を早くすべく電圧を上げると電解液抵
抗のため浴電圧が上昇し、また電解液３の温度が上が
り、それだけ消費電力が大きくなる。また、極間を狭く
して、極間の抵抗を低くしようとすれば、電解液中３中
に陽極であるPb−Ag1wt％板４から発生した酸素の気泡
が抜けにくいため著しく増え、電流が一層流れにくくな
るものである。そしてこのような状態に於いて、陽極か
ら発生する酸素と陰極から発生する水素とを別々に取り
出そうとしても酸素と水素が混ざり会う為、困難であ
る。Therefore, if the voltage is increased to increase the electrolysis speed, the bath voltage rises due to the resistance of the electrolytic solution, and the temperature of the electrolytic solution 3 rises, resulting in a corresponding increase in power consumption. Also, if the gap between the electrodes is narrowed and the resistance between the electrodes is reduced, the bubbles of oxygen generated from the Pb-Ag1 wt% plate 4, which is the anode, in the electrolytic solution 3 are difficult to escape, and the current increases remarkably. It becomes more difficult to flow. In such a state, it is difficult to take out oxygen generated from the anode and hydrogen generated from the cathode separately, because oxygen and hydrogen are mixed together.
（発明の目的） 本発明は、上記問題点を解決すべくなされたもので、陽
極の表面に酸素の気泡が形成されず、従って電解液中に
酸素の気泡が無く、電流の通りが良くて電解速度が早
く、また陰極から発生する水素に酸素が混じることがな
く、さらに装置を小型化でき、しかも作業性の良い亜鉛
の電解方法及び装置を提供することを目的とするもので
ある。(Object of the invention) The present invention has been made to solve the above-mentioned problems, and oxygen bubbles are not formed on the surface of the anode. Therefore, there are no oxygen bubbles in the electrolytic solution, and the current flow is good. It is an object of the present invention to provide a zinc electrolysis method and a device which have a high electrolysis rate, do not mix oxygen with hydrogen generated from the cathode, can further downsize the device, and have good workability.
（問題点を解決するための手段） 上記問題点を解決するための本発明の亜鉛の電解方法
は、陰極として両面の少なくとも外周側を絶縁被覆した
Alの回転円板を垂直にしてその下部を電解液中に浸漬し
て配し、この回転円板の電解液中における両面の露出部
の下部に接近対向させて陽極として円弧状のガス拡散電
極を配しこれに水素を供給して電解を行い、前記回転円
板を回転させ乍ら該回転円板を両面の露出部に析出され
る亜鉛の箔を剥離することを特徴とするものである。(Means for Solving the Problems) In the zinc electrolysis method of the present invention for solving the above problems, at least the outer peripheral side of both surfaces is insulated and coated as a cathode.
The rotating disk of Al is placed vertically and the lower part is immersed in the electrolytic solution and placed so that it faces the lower parts of the exposed parts on both sides of the rotating disk in the electrolytic solution, and the arc-shaped gas diffusion electrode serves as the anode. Is arranged and hydrogen is supplied to this to perform electrolysis, and the rotating disk is rotated to peel off the zinc foil deposited on the exposed parts of both surfaces of the rotating disk. .
また本発明の亜鉛の電解装置は、電解槽内の中央に、Al
の回転円板の両面の少なくとも外周側を絶縁被覆して成
る陰極を垂直にして回転可能に支持し、この陰極の両面
の露出部の下部に接近対向して円弧状のガス拡散電極よ
り成る陽極を垂直に配して電解槽壁に固定し、各陽極の
上下に電解循環路を設け、各陽極の外面両端部に水素の
供給口と排出口を設けて成るものである。Further, the zinc electrolysis apparatus of the present invention, in the center of the electrolytic cell, Al
The rotating disk has a cathode vertically rotatably supported on at least the outer periphery of both sides of the rotating disk, and is rotatably supported. Are vertically arranged and fixed to the wall of the electrolytic cell, electrolytic circulation paths are provided above and below each anode, and hydrogen supply ports and discharge ports are provided at both ends of the outer surface of each anode.
（作用） 上記本発明の亜鉛の電解方法では、陽極として水素減極
ガス拡散電極を用いているので、表面に酸素の気泡が形
成されず、電解液中に水素の気泡が浮上することがな
い。その為、電流が通り易くなり、電解速度が早くな
る。また水素を陽極で酸化する為電圧を下げることがで
きて、電解液の温度が上がらず、その分消費電力が少な
くなる。さらに陰極から発生する水素には酸素が混じる
ことがないので、水素をそのまま取り出して再使用でき
る。(Operation) In the zinc electrolysis method of the present invention, since the hydrogen depolarized gas diffusion electrode is used as the anode, oxygen bubbles are not formed on the surface, and hydrogen bubbles do not float in the electrolytic solution. . Therefore, the current can easily pass therethrough and the electrolysis speed can be increased. Further, since hydrogen is oxidized at the anode, the voltage can be lowered, the temperature of the electrolytic solution does not rise, and the power consumption is reduced accordingly. Furthermore, since hydrogen generated from the cathode is not mixed with oxygen, hydrogen can be directly taken out and reused.
また本発明の亜鉛の電解装置では、陰極が回転円板であ
り、その両面の電解液中における露出部の下部に対向す
る陽極の表面に酸素の気泡が形成されないガス拡散電極
で、両極間を狭くできるので、電解液抵抗によるIRドロ
ップが小さく、電圧を下げることができるばかりでな
く、極間の抵抗を低くできて、電流を通し易くなり、電
解速度を早くできると共に装置を小型化でき、しかも陰
極の両面から連続的に亜鉛箔が得られる。Further, in the zinc electrolysis apparatus of the present invention, the cathode is a rotating disk, and a gas diffusion electrode in which oxygen bubbles are not formed on the surface of the anode facing the lower part of the exposed portion in the electrolytic solution on both surfaces, and between the electrodes. Since it can be narrowed, the IR drop due to the electrolytic solution resistance is small, not only can the voltage be lowered, but also the resistance between the electrodes can be lowered, making it easier to pass current, increasing the electrolysis speed and downsizing the device, Moreover, zinc foil can be continuously obtained from both surfaces of the cathode.
（実施例） 本発明による亜鉛の電解方法及び電解装置の一実施例を
説明する。先ず電解装置を第１図及び第２図によって説
明すると、10は縦20mm、横250mm、深さ100mmの電解槽、
11は電解槽10内の中央に垂直にして回転可能に支持した
直径200mm、厚さ2mmのAlの回転円板11aの両面の外周側
と中央部に同心に塩化ビニル11bを厚さ1.0mm絶縁被覆し
て、外径95mm、内径75mmの環状露出部11cを形成して成
る陰極で、電解槽10中の中央に垂直にして回転可能に支
持されている。この陰極11の両面の環状露出部11cの下
部に接近対向して、即ち2.5mmの間隔を存して幅20mm、
長さ75mm、厚さ0.5mmの円弧状のガス拡散電極より成る
陽極12、12′が垂直に電解槽10の左右側壁に固定されて
いる。各陽極12、12′の上側には電解液導出路13が設け
られてその途中にポンプ14が設けられ、先端が貯槽15内
の上部に開口されている。各陽極12、12′の下側には電
解液導入路16が設けられ、これの基端が前記貯槽15の下
部に接続されている。(Example) An example of the zinc electrolysis method and electrolysis apparatus according to the present invention will be described. First, the electrolysis apparatus will be described with reference to FIGS. 1 and 2, 10 is an electrolysis cell having a length of 20 mm, a width of 250 mm, and a depth of 100 mm,
11 is a vinyl chloride 11b with a thickness of 200 mm and a diameter of 200 mm, which is rotatably supported vertically in the center of the electrolytic cell 10 and is concentric with the outer peripheral side and the center of both sides of the rotating disk 11a of Al having a thickness of 2 mm. A cathode formed by coating and forming an annular exposed portion 11c having an outer diameter of 95 mm and an inner diameter of 75 mm is rotatably supported vertically in the center of the electrolytic cell 10. Closely opposed to the lower part of the annular exposed portion 11c on both sides of the cathode 11, that is, a width of 20 mm with an interval of 2.5 mm,
Anodes 12 and 12 'composed of arc-shaped gas diffusion electrodes having a length of 75 mm and a thickness of 0.5 mm are vertically fixed to the left and right side walls of the electrolytic cell 10. An electrolyte solution discharge path 13 is provided on the upper side of each of the anodes 12 and 12 ', a pump 14 is provided in the middle of the path, and the tip end is opened to the upper part in the storage tank 15. An electrolyte introducing passage 16 is provided below each of the anodes 12 and 12 ', and a base end of the passage 16 is connected to a lower portion of the storage tank 15.
従って、各陽極12、12′の上下には電解液循環路17が形
成されている。各陽極12、12′の外面両端部には水素の
供給口18と排出口19が設けられ、排出口19は水素供給循
環装置の入口に接続され、供給口18の基端は供給循環装
置の出口に接続されている。21は電解液導出路13の開口
縁上側で陽極12、12′を全長に亘って被う円弧状のカバ
ーで、該カバー21の陰極11側は下方に直角に屈曲してお
り、下方に直角に屈曲している。そして陰極11の両面中
央部の絶縁被覆の外周には、前記円弧状のカバー21の陰
極11側の屈曲部21aをかかえるように断面Ｌ形のガイド
リング22が設けられている。Therefore, an electrolyte circulation path 17 is formed above and below each anode 12, 12 '. A hydrogen supply port 18 and a hydrogen discharge port 19 are provided at both ends of the outer surface of each of the anodes 12 and 12 ', the discharge port 19 is connected to the inlet of the hydrogen supply circulation device, and the base end of the supply port 18 is of the supply circulation device. Connected to the exit. Reference numeral 21 denotes an arc-shaped cover which covers the anodes 12 and 12 'over the entire length above the opening edge of the electrolyte solution discharge path 13, and the cathode 11 side of the cover 21 is bent downward at a right angle and is bent downward at a right angle. Is bent to. A guide ring 22 having an L-shaped cross section is provided on the outer periphery of the insulating coating at the center of both surfaces of the cathode 11 so as to cover the bent portion 21a of the arc-shaped cover 21 on the cathode 11 side.
次に上記構成の電解装置を用いる本発明の亜鉛の電解方
法を説明する。第１図及び第２図に示す如く電解槽10内
に電解液23として亜鉛処理液（Zn60g/、H2SO4180g/
）を送給し、陰極11の外周部を深さ70mm浸漬させ、ま
たガス拡散電極より成る陽極12、12′を浸漬させた。次
に陽極12、12′へ水素供給循環装置より供給口18を通し
て水素を供給し、電流7.5A、電圧1.5Vで電解を行い、陰
極11であるAlの回転円板11aの両面の環状露出部11cに亜
鉛を析出し、箔を形成し乍ら、陰極11を1.5回/hrで回転
し、亜鉛箔24を剥離していった。Next, the zinc electrolysis method of the present invention using the electrolysis apparatus having the above-described configuration will be described. As shown in FIG. 1 and FIG. 2, a zinc treatment solution (Zn 60 g /, H 2 SO 4 180 g /
) Was fed, the outer peripheral portion of the cathode 11 was dipped to a depth of 70 mm, and the anodes 12 and 12 'composed of gas diffusion electrodes were dipped. Next, hydrogen is supplied to the anodes 12 and 12 'from the hydrogen supply / circulation device through the supply port 18, electrolysis is performed at a current of 7.5 A and a voltage of 1.5 V, and the annular exposed portions on both sides of the rotating disk 11a of Al, which is the cathode 11, are formed. Zinc was deposited on 11c to form a foil, and the cathode 11 was rotated at 1.5 times / hr to peel off the zinc foil 24.
この亜鉛の電解中、ガス拡散電極である陽極12、12′に
供給された水素は、電解液23中の陽極12、12′の表面で
H+イオンとなりOH-イオンと反応して水に変換され、余
分の水素は排出口19より排出され、再び水素供給循環装
置の入口に通されて水素供給循環装置からの水素と共に
陽極12、12′へ供給される。かくして陽極12、12′の表
面には酸素の気泡が形成されず、従って電解液23中を酸
素の気泡が浮上することがない。その為酸素の気泡によ
って電流が通りが阻害されることがなく、電流が通り易
くなり、電解速度が従来の10倍程度早くなり、しかも電
圧を従来の2/5に下げることができた。電流効率は89〜8
6％であった。回収水素を含めるとさらに効率がよくな
る。また電解液23の温度が上がらず、その分消費電力が
少なくなった。During the electrolysis of zinc, hydrogen supplied to the anodes 12 and 12 ', which are gas diffusion electrodes, is discharged on the surfaces of the anodes 12 and 12' in the electrolytic solution 23.
It becomes H + ions and reacts with OH − ions to be converted to water, and the excess hydrogen is discharged from the discharge port 19 and passed through the inlet of the hydrogen supply circulation device again, along with hydrogen from the hydrogen supply circulation device to the anodes 12 and 12. ’ Thus, no oxygen bubbles are formed on the surfaces of the anodes 12 and 12 ', so that oxygen bubbles do not float in the electrolytic solution 23. Therefore, the passage of the current was not obstructed by the bubbles of oxygen, the current could easily pass, the electrolysis rate was about 10 times faster than the conventional one, and the voltage could be reduced to 2/5 of the conventional one. Current efficiency is 89-8
It was 6%. Inclusion of recovered hydrogen is even more efficient. Further, the temperature of the electrolytic solution 23 did not rise, and the power consumption was reduced accordingly.
さらに電解中陰極11の環状露出部11cから発生して浮上
する水素は、電解液23の上部がカバー21で被われている
ので、無駄に大気に放散されることがなく、電解中ポン
プ14の駆動により陽極12、12′の上側の導出路13より電
解液23を導出し、貯槽15内に一旦溜することにより水素
が貯槽15の上部密閉空間に浮上して貯えられ、水素が除
去された電解液23は貯槽15の下部より電解層10内に導入
路16を通して導入される。こうして電解液23の循環を繰
返すことにより、陰極11の環状露出部11cから発生する
水素は殆んど全て貯槽15の上部密閉空間に貯えられるの
で、ガス拡散電極である陽極12、12′への水素の供給に
役立てることができる。Further, hydrogen generated from the annular exposed portion 11c of the cathode 11 during electrolysis and floating is covered with the upper portion of the electrolytic solution 23 by the cover 21, so that it is not wasted to the atmosphere unnecessarily, and By driving, the electrolyte solution 23 is led out from the lead-out path 13 above the anodes 12 and 12 ', and once stored in the storage tank 15, hydrogen is floated and stored in the upper closed space of the storage tank 15, and the hydrogen is removed. The electrolytic solution 23 is introduced from the lower part of the storage tank 15 into the electrolytic layer 10 through the introduction path 16. By repeating the circulation of the electrolytic solution 23 in this way, almost all of the hydrogen generated from the annular exposed portion 11c of the cathode 11 is stored in the upper closed space of the storage tank 15, so that the anodes 12 and 12 'which are gas diffusion electrodes are stored. It can be used to supply hydrogen.
尚、上記実施例の電解装置では、陰極11がAlの回転円板
11aの両面の外周側と中央部に絶縁被覆したものである
が、外周側のみ絶縁被覆したものであっても良い。Incidentally, in the electrolytic device of the above embodiment, the cathode 11 is a rotating disk of Al.
The outer peripheral side and the central part of both surfaces of 11a are insulation-coated, but the outer peripheral side may be insulation-coated.
（発明の効果） 以上の説明で判るように本発明の亜鉛の電解方法によれ
ば、陽極の表面に酸素の気泡が形成されず、従って電解
液中を酸素の気泡が浮上することがなく、電流の通りが
良くて電解速度が早いので、著しく電解能率が向上し
た。また電圧を下げることができて、電解液の温度が上
がらず、その分消費電力を減少できた。さらに陰極が発
生する水素には酸素が混じることがなく、そのまま取り
出すことができ、これを陽極に供給し、再使用すれば、
電解効率が高くなる。(Effects of the Invention) As can be seen from the above description, according to the zinc electrolysis method of the present invention, oxygen bubbles are not formed on the surface of the anode, and therefore oxygen bubbles do not float in the electrolytic solution. Since the current flow is good and the electrolysis rate is fast, the electrolysis efficiency is significantly improved. In addition, the voltage could be lowered, the temperature of the electrolytic solution did not rise, and the power consumption could be reduced accordingly. Furthermore, hydrogen generated by the cathode does not mix with oxygen and can be taken out as it is. If this is supplied to the anode and reused,
Electrolytic efficiency becomes high.
また本発明の亜鉛の電解装置は、陰極が回転円板であ
り、その両面の電解液中における露出部の下部に対向す
る陽極が表面に酸素の気泡が形成されないガス拡散電極
があるので、極間を数mm程度まで著しく狭くできる。従
って、極間の電解液による抵抗を低くできて、電圧を下
げることができるばかりでなく、電流が通り易くなり、
電解速度を早くできると共に装置が小型化し、しかも陰
極の両面から連続的に亜鉛箔が得られ、生産性、作業性
が向上する。Further, in the zinc electrolysis apparatus of the present invention, the cathode is a rotating disk, and the anode facing the lower part of the exposed part in the electrolytic solution on both surfaces of the cathode has a gas diffusion electrode in which oxygen bubbles are not formed on the surface. The distance can be significantly narrowed to about several mm. Therefore, the resistance due to the electrolyte between the electrodes can be lowered, not only the voltage can be lowered, but also the current can easily pass,
The electrolytic rate can be increased, the apparatus can be downsized, and zinc foil can be continuously obtained from both sides of the cathode, which improves productivity and workability.
第１図は本発明の亜鉛の電解装置を示す縦断正面図、第
２図は第１図のＡ−Ａ矢視側面図、第３図は従来の亜鉛
の電解装置を示す縦断正面図である。FIG. 1 is a vertical sectional front view showing the zinc electrolysis apparatus of the present invention, FIG. 2 is a side view taken along the line AA of FIG. 1, and FIG. 3 is a vertical front view showing a conventional zinc electrolysis apparatus. .
Claims (2)
の少なくとも外周側を絶縁被覆したAlの回転円板を垂直
にしてその下部を電解液中に浸漬して配し、この回転円
板の電解液中における両面の露出部の下部に接近対向さ
せて陽極として円弧状のガス拡散電極を配し、これに水
素を供給して電解を行い、前記回転円板を回転させ乍ら
該回転円板の両面の露出部に析出される亜鉛の箔を剥離
することを特徴とする亜鉛の電解方法。1. In a zinc electrolysis method, a rotating disk made of Al having at least outer peripheral sides on both sides is insulated as a cathode is made vertical, and the lower part thereof is immersed in an electrolytic solution and disposed. The arc-shaped gas diffusion electrode as an anode is placed close to and facing the lower parts of the exposed parts on both sides in the electrolytic solution, and hydrogen is supplied to this to carry out electrolysis, and the rotating disk is rotated to rotate. A method for electrolyzing zinc, characterized in that the zinc foil deposited on the exposed portions of both sides of the disk is peeled off.
少なくとも外周側を絶縁被覆して成る陰極を垂直にして
回転可能に支持し、この陰極の両面の露出部の下部に接
近対向して円弧状のガス拡散電極より成る陽極を垂直に
配して電解槽壁に固定し、各陽極の上下に電解液循環路
を設け、各陽極の外面両端部に水素の供給口と排出口を
設けて成る亜鉛の電解装置。2. A cathode, which is formed by insulatingly coating at least the outer peripheral sides of both sides of an Al rotating disk in the center of the electrolytic cell, is rotatably supported in a vertical direction. Anodes consisting of arc-shaped gas diffusion electrodes facing each other close to each other were vertically arranged and fixed to the electrolytic cell wall, and electrolytic solution circulation paths were provided above and below each anode, and hydrogen supply ports were provided at both ends of the outer surface of each anode. Zinc electrolysis device with a discharge port.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62049802A JPH0713311B2 (en) | 1987-03-04 | 1987-03-04 | Zinc electrolysis method and apparatus |
| EP88830084A EP0281531A1 (en) | 1987-03-04 | 1988-03-02 | Method for electrolyzing zinc and apparatus therefor |
| US07/164,070 US4793902A (en) | 1987-03-04 | 1988-03-04 | Method for electrolyzing zinc and apparatus therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62049802A JPH0713311B2 (en) | 1987-03-04 | 1987-03-04 | Zinc electrolysis method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63216991A JPS63216991A (en) | 1988-09-09 |
| JPH0713311B2 true JPH0713311B2 (en) | 1995-02-15 |
Family
ID=12841276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62049802A Expired - Lifetime JPH0713311B2 (en) | 1987-03-04 | 1987-03-04 | Zinc electrolysis method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0713311B2 (en) |
-
1987
- 1987-03-04 JP JP62049802A patent/JPH0713311B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63216991A (en) | 1988-09-09 |
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